139138147 has 4 divisors (see below), whose sum is σ = 139161960. Its totient is φ = 139114336.

The previous prime is 139138099. The next prime is 139138157. The reversal of 139138147 is 741831931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 139138147 - 2¹¹ = 139136099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139138157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3528 + ... + 17050.

It is an arithmetic number, because the mean of its divisors is an integer number (34790490).

Almost surely, 2^139138147 is an apocalyptic number.

139138147 is a deficient number, since it is larger than the sum of its proper divisors (23813).

139138147 is a wasteful number, since it uses less digits than its factorization.

139138147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23812.

The product of its digits is 18144, while the sum is 37.

The square root of 139138147 is about 11795.6834053818. The cubic root of 139138147 is about 518.1817003432.

The spelling of 139138147 in words is "one hundred thirty-nine million, one hundred thirty-eight thousand, one hundred forty-seven".